Revisit the K-segment of the Southeast Indian Ridge for new evidence of hydrothermal plumes  

作　　者：WANG TingTing CHEN YongShun John TAO ChunHui 

机构地区：[1]Institute of Theoretical and Applied Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871, China [2]The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

出　　处：《Chinese Science Bulletin》2011年第33期3605-3609,共5页

基　　金：supported by the National Natural Science Foundation of China (40676023 and 40821062);COMRA (DYXM-115-02-03-02)

摘　　要：在到在 2007 的东南印度理兹(SEIR ) 的中国研究巡航的第一条腿期间，我们重游 SEIR 的 K 片断并且在一个 CTD 演员组车站观察了一个水列混浊异例。这个车站被定位从一个羽毛异例上的一个捞网地点的 400 m 由美国科学家在 1996 检测了。在我们的调查检测的混浊异例的特征与那些不同以前观察了 11 年，暗示也，检测异例有不同、不同的羽毛来源或羽毛的坚韧性在干涉时间变化了。另外，混浊异例在深 tow-yo 侧面在 K 片断上在二个地区被观察。如果这二个异例没被连接，计算的羽毛发生将是大约 0.28，比为传播的 65 mm/a 的 0.25 的预言的价值大率。K 片断上的羽毛发生的这增加似乎与圣保拉姆斯特达姆热点的影响有关，定位了大约 300 km 到西北。During the first leg of a Chinese research cruise to the Southeast Indian Ridge （SEIR） in 2007, we revisited the K-segment of the SEIR and observed a water column turbidity anomaly at a CTD cast station. This station was located -400 m from a dredge site on a plume anomaly detected in 1996 by US scientists. The characteristics of the turbidity anomaly detected in our survey are different from those observed 11 years previously, implying that either the detected anomalies have distinct and different plume sources or the robustness of the plume has changed in the intervening time. In addition, turbidity anomalies were observed at two localities on the K-segment in a deep tow-yo profile. If these two anomalies are not connected, the plume incidence calculated would be about 0.28, larger than the predicted value of 0.25 for a 65 rnm/a spreading rate. This increase in plume incidence on the K-segment seems to be related to the influence of the St. Paul-Amsterdam hotspot, located about 300 km to the northwest.

关 键 词：南印度洋 东南亚 证据 热液 美国科学家 阿姆斯特丹 发病率 异常 

分 类 号：P733.4[天文地球—物理海洋学]